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Smoggy is the best way to track air quality across the United States, Canada, Mexico and Puerto Rico.Use your current location, add locations by zip code, or search by city name and Smoggy will find the nearest active air quality station and report the latest values!

FEATURES- Monitoring over 2,400 air quality stations across North America. Stations are continuously monitored and updated to ensure up-to-date air quality data. Measurements provided by airnow.gov.- Track the Air Quality Index, Particulate Matter, Ozone and up to 20 other measurements for any location added.- Track temperature, precipitation, humidity, pressure and uv index for any location added.- Know the best times to exercise and be outside and when to avoid harmful particulate matter in the air.- Compare your city. The best and worst locations are listed so you can see where your city's air quality ranks against the competition.- Track the air quality forecast for any location added. Your location's historical air quality data is weighted using digital filtering and linear interpolation in order to provide the most accurate forecast for tomorrow's AQI rating. - Today Extension. Easy access for tracking your current and favorite locations' air quality and temperatures using the new Smoggy Today Extension.

NOTE Continued use of GPS running in the background can dramatically decrease battery life.Smoggy updates your active location's air quality as infrequently as possible to be as kind to your power as possible. Smoggy can also track manually searched locations if your GPS is switched off!